選購壓力表的重要參數
一、壓力表的精度
精度是直接影響壓力表測量結果誤差的因素，所以當用戶對測量結果的精度要求較高時，就要選擇精度等級稍高的壓力表，反之，則選擇精度稍低適宜的即可，避免出現盲目追求高精度等級的現象。
二、壓力表的量程
為了保證壓力表彈性元件能在彈性變形的安全范圍內可靠地工作，壓力表量程的選擇不僅要根據被測壓力的大小，而且還應考慮被測壓力變化的速度，其量程需留有足夠的余地。
一般情況下，所選的最大量程值要比最大壓力范圍還大三分之二，最小量程值則要比最小壓力范圍還小三分之一，避免測量過程中出現壓力波動的情況。
三、壓力表的尺寸
壓力表是由表盤、表殼、接頭、指針等部分組成的，所以事先確定好表盤的尺寸也是非常必要的，如果安裝空間較狹小，那就要選擇尺寸較小的表盤，反之，則可選擇表盤直徑稍大的壓力表。
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